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  <div class="section" id="sintef-de-50">
<h1>sintef.de_50<a class="headerlink" href="#sintef-de-50" title="Permalink to this headline">¶</a></h1>
<dl class="function">
<dt id="sintef.de_50">
<code class="sig-prename descclassname">sintef.</code><code class="sig-name descname">de_50</code><span class="sig-paren">(</span><em class="sig-param">U</em>, <em class="sig-param">D</em>, <em class="sig-param">rho_p</em>, <em class="sig-param">mu_p</em>, <em class="sig-param">sigma</em>, <em class="sig-param">rho</em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/sintef.html#de_50"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#sintef.de_50" title="Permalink to this definition">¶</a></dt>
<dd><p>This function is deprecated:  Use psf.sintef_d50() instead.</p>
<p>Predict the volume mean diameter from a modified Weber number model</p>
<p>Calculates the SINTEF modified Weber number model for the volume mean 
diameter of a blowout release.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>U</strong><span class="classifier">float</span></dt><dd><p>Effective exit velocity after void fraction and buoyancy correction 
of the phase undergoing breakup (m/s)</p>
</dd>
<dt><strong>D</strong><span class="classifier">float</span></dt><dd><p>Diameter of the discharge (m)</p>
</dd>
<dt><strong>rho_p</strong><span class="classifier">float</span></dt><dd><p>Density of the phase undergoing breakup (kg/m^3)</p>
</dd>
<dt><strong>mu_p</strong><span class="classifier">float</span></dt><dd><p>Dynamic viscosity of the phase undergoing breakup (Pa s)</p>
</dd>
<dt><strong>sigma</strong><span class="classifier">float</span></dt><dd><p>Interfacial tension between the phase undergoing breakup and the 
ambient receiving continuous phase (N/m)</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>de_50</strong><span class="classifier">float</span></dt><dd><p>The volume mean diameter of the phase undergoing breakup</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Notes</p>
<p>This function first checks the We number.  If the We is less than the 
critical value of 350 required for atomization, then the fluid particle 
diameter is estimated as 1.2 D.  Otherwise, the SINTEF modified We number 
model is used.  In both cases, the resulting particle diameter is compared
to the maximum stable particle size per Clif et al. (1978) of</p>
<blockquote>
<div><p>d_max = 4 (sigma/ (g (rho - rho_p)))^(1/2).</p>
</div></blockquote>
<p>The function returns the lesser of the estimated particle size or the 
maximum stable particle size.</p>
</dd></dl>

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